A remote device in accordance with the present invention includes an adaptive power receiver that receives wireless power from the wireless power supply by induction. The adaptive power receiver may be switched among two or more modes of operation, including, for example, a high-Q mode and a low-Q mode. By controlling the switching between modes, the amount of energy received by the adaptive receiver may be controlled. This control is a form of adaptive resonance control or Q control.
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1. A wireless power transmitter for wirelessly transmitting power to a remote device, said wireless power transmitter comprising: an adaptive power transmitter configured to transmit wireless power to the remote device, said adaptive power transmitter being configurable to a first mode and to a second mode, wherein in said first mode, said adaptive power transmitter has a first resonant frequency, wherein in said second mode, said adaptive power transmitter has a second resonant frequency which is different from the first resonant frequency; and a controller operably coupled to the adaptive power transmitter, said controller being configured to control the power transmitted to the remote device by a wireless power supply by selectively configuring the adaptive power transmitter between said first mode and said second mode, wherein said controller changes an effective resonant frequency for said wireless power transmitter by changing a duration of time over which the adaptive power transmitter is in the first mode relative to a duration of time over which the adaptive power transmitter is in the second mode, and wherein said controller is configured to control the power transmitted to the remote device by selectively configuring the adaptive power transmitter between the first mode and the second mode by selectively configuring the adaptive power transmitter from the first mode to the second mode at least once per wavelength of the power transmitter.
A wireless power transmitter system is designed to efficiently transmit power to a remote device by dynamically adjusting its resonant frequency. The system includes an adaptive power transmitter that can operate in two distinct modes, each with a different resonant frequency. A controller is connected to the adaptive power transmitter and manages the power transmission by switching between these modes. The controller adjusts the effective resonant frequency of the transmitter by varying the time spent in each mode, allowing precise control over the power delivered to the remote device. The controller also ensures that the transmitter switches between modes at least once per wavelength of the transmitted power, enabling rapid adjustments to optimize power transfer efficiency. This dynamic frequency modulation helps maintain optimal power delivery even as environmental or load conditions change, improving the reliability and performance of wireless power transmission systems. The system is particularly useful in applications where consistent power delivery is critical, such as in consumer electronics, medical devices, or industrial equipment.
2. The wireless power transmitter of claim 1 , wherein said adaptive power transmitter includes an impedance element and a switch, wherein in said first mode said switch is closed and said impedance element is electrically connected to said adaptive power transmitter, wherein in said second mode said switch is open and said impedance element is electrically disconnected from said adaptive power transmitter.
Wireless power transmission systems face challenges in efficiently delivering power to receiving devices, particularly when multiple devices are present or environmental conditions vary. To address this, an adaptive power transmitter is designed to dynamically adjust its output characteristics. The transmitter includes an impedance element and a switch that can be configured in at least two modes. In a first mode, the switch is closed, electrically connecting the impedance element to the transmitter, which modifies the transmitter's impedance or resonance characteristics to optimize power transfer under specific conditions, such as when multiple devices are present or when environmental factors like distance or alignment affect efficiency. In a second mode, the switch is open, disconnecting the impedance element from the transmitter, allowing the system to revert to a default or alternative configuration for different operating scenarios, such as when fewer devices are present or when environmental conditions favor a simpler circuit topology. This adaptability improves power transfer efficiency, reduces energy waste, and enhances compatibility with various receiving devices. The impedance element may include passive components like capacitors or inductors, and the switch may be a solid-state or mechanical switch, depending on the application. The system may also include control logic to automatically select the appropriate mode based on real-time feedback from the receiving devices or environmental sensors.
3. The wireless power transmitter of claim 2 , wherein said controller is configured to control the power transmitted to the remote device by selectively configuring the adaptive power transmitter between the first mode and the second mode by selectively configuring the adaptive power transmitter from the first mode to the second mode at least twice per wavelength of the power transmitted.
Wireless power transmission systems face challenges in efficiently delivering power to remote devices, particularly when the distance or alignment between the transmitter and receiver varies. This can lead to power loss, reduced efficiency, or overheating. To address these issues, an adaptive wireless power transmitter dynamically adjusts its operating mode to optimize power delivery. The transmitter includes a controller that selectively switches between a first mode and a second mode at least twice per wavelength of the transmitted power. The first mode may involve a specific frequency, phase, or amplitude configuration, while the second mode uses a different setting to improve power transfer efficiency or compensate for environmental changes. By rapidly toggling between these modes, the transmitter can adapt to varying conditions, such as changes in distance or misalignment, ensuring consistent and efficient power delivery to the remote device. This adaptive switching helps maintain optimal power transfer while minimizing energy waste and potential overheating. The system may also include additional features, such as feedback mechanisms or sensors, to further refine power transmission based on real-time conditions.
4. A wireless power transmitter for wirelessly transmitting power to a remote device, said wireless power transmitter comprising: an adaptive power transmitter configured to transmit wireless power to the remote device, said adaptive power transmitter being configurable to a first mode and to a second mode; and a controller operably coupled to the adaptive power transmitter, said controller being configured to control the power transmitted by a wireless power supply by selectively configuring the adaptive power transmitter between said first mode and said second mode at a duty cycle at least once per wavelength of the power transmitted, wherein said controller changes an effective resonant frequency for said wireless power transmitter by changing a duration of time over which the adaptive power transmitter is in the first mode relative to a duration of time over which the adaptive power transmitter is in the second mode, wherein increasing the duty cycle increases the duration of time over which the adaptive power transmitter is in the first mode for each wavelength of the power transmitted, and wherein decreasing the duty cycle decreases the duration of time over which the adaptive power transmitter is in the first mode for each wavelength of the power transmitted.
A wireless power transmitter system is designed to efficiently transmit power to remote devices by dynamically adjusting its operating parameters. The system includes an adaptive power transmitter capable of switching between two distinct modes—first and second modes—at a duty cycle that changes at least once per wavelength of the transmitted power. A controller regulates the power output by selectively configuring the transmitter between these modes, effectively altering the resonant frequency of the system. The duration of time the transmitter spends in the first mode relative to the second mode determines the effective resonant frequency. Increasing the duty cycle extends the time in the first mode per wavelength, while decreasing it reduces this duration. This adaptive control allows the transmitter to optimize power delivery based on varying conditions, such as distance or alignment with the receiving device, improving efficiency and performance. The system avoids fixed resonant frequencies, enabling real-time adjustments to maintain optimal power transfer. This approach addresses challenges in maintaining efficient wireless power transmission under dynamic environmental and operational conditions.
5. The wireless power transmitter of claim 4 , wherein in said first mode, said adaptive power transmitter has a lower Q factor, wherein in said second mode, said adaptive power transmitter has a higher Q factor which is higher than the lower Q factor.
This invention relates to wireless power transmission systems, specifically an adaptive power transmitter that dynamically adjusts its quality factor (Q factor) to optimize power transfer efficiency and performance. The problem addressed is the trade-off between efficiency and adaptability in wireless power transmission, where a fixed Q factor may not be optimal for all operating conditions or receiver devices. The adaptive power transmitter operates in at least two modes: a first mode with a lower Q factor and a second mode with a higher Q factor, where the higher Q factor is greater than the lower Q factor. The lower Q factor mode prioritizes broader bandwidth and faster transient response, making it suitable for initial power transfer or when dealing with varying load conditions. The higher Q factor mode maximizes efficiency by reducing losses, ideal for stable power delivery once alignment and coupling are established. The transmitter may include resonant circuits, impedance matching networks, or other tuning mechanisms to dynamically switch between these modes based on system requirements, such as receiver distance, alignment, or power demand. This adaptability ensures efficient power transfer across different scenarios without manual adjustments.
6. The wireless power transmitter of claim 4 , wherein said controller changes an effective Q factor for said wireless power transmitter by changing the duration of time over which the adaptive power transmitter is in the first mode relative to the duration of time over which the adaptive power transmitter is in the second mode.
This invention relates to wireless power transmission systems, specifically adaptive power transmitters that dynamically adjust their operating parameters to optimize power transfer efficiency and performance. The problem addressed is the need for wireless power transmitters to efficiently deliver power to receivers under varying conditions, such as changes in distance, alignment, or load requirements, while maintaining stable and reliable operation. The wireless power transmitter includes a controller that dynamically adjusts the effective quality factor (Q factor) of the transmitter by modulating the time spent in two distinct operating modes. The first mode is characterized by a higher Q factor, which enhances power transfer efficiency but may reduce stability under certain conditions. The second mode operates with a lower Q factor, improving stability but potentially reducing efficiency. The controller balances these modes by varying the duration of time the transmitter spends in each mode, thereby optimizing the overall performance based on real-time conditions. This adaptive approach allows the transmitter to dynamically respond to changes in the power transfer environment, ensuring efficient and stable power delivery without requiring manual adjustments or complex feedback mechanisms. The system is particularly useful in applications where the distance or alignment between the transmitter and receiver may vary, such as in consumer electronics, electric vehicle charging, or industrial wireless power systems.
7. The wireless power transmitter of claim 4 , wherein in said first mode, said adaptive power transmitter has a first resonant frequency, wherein in said second mode, said adaptive power transmitter has a second resonant frequency which is different from the first resonant frequency.
This invention relates to wireless power transmission systems, specifically adaptive power transmitters capable of dynamically adjusting their resonant frequency to optimize power transfer efficiency. The problem addressed is the inefficiency in wireless power transfer when the transmitter and receiver are not perfectly matched in frequency, leading to reduced power delivery and energy loss. The adaptive power transmitter operates in at least two distinct modes. In a first mode, the transmitter is configured with a first resonant frequency, optimized for power transfer under certain conditions, such as when the receiver is at a specific distance or orientation. In a second mode, the transmitter switches to a second resonant frequency, different from the first, to adapt to changing conditions, such as varying receiver positions or environmental factors. This frequency adjustment allows the transmitter to maintain efficient power transfer even as the operating conditions fluctuate. The transmitter may include tunable components, such as variable capacitors or inductors, that enable the resonant frequency to be dynamically adjusted between the first and second modes. The system may also incorporate feedback mechanisms to detect changes in power transfer efficiency and trigger the switch between modes. By dynamically adjusting the resonant frequency, the transmitter ensures optimal power delivery to the receiver, improving overall system efficiency and reliability. This adaptability is particularly useful in applications where the receiver's position or orientation relative to the transmitter is not fixed, such as in consumer electronics or electric vehicle charging.
8. The wireless power transmitter of claim 4 , wherein said adaptive power transmitter includes an impedance element and a switch, wherein in said first mode said switch is closed and said impedance element is electrically connected to said adaptive power transmitter, wherein in said second mode said switch is open and said impedance element is electrically disconnected from said adaptive power transmitter.
Wireless power transmission systems face challenges in efficiently delivering power to receiving devices, particularly when multiple devices are present or environmental conditions vary. To address this, an adaptive power transmitter is designed to dynamically adjust its output characteristics. The transmitter includes an impedance element and a switch that can reconfigure the transmitter's electrical properties. In a first operational mode, the switch is closed, electrically connecting the impedance element to the transmitter, altering its impedance or resonance characteristics to optimize power transfer under specific conditions. In a second mode, the switch is open, disconnecting the impedance element, which modifies the transmitter's behavior to suit different scenarios, such as reducing power loss or improving efficiency. This adaptability allows the transmitter to respond to changes in load conditions, environmental factors, or the presence of multiple receiving devices, enhancing overall system performance. The impedance element and switch work together to enable seamless transitions between modes, ensuring consistent and efficient power delivery.
9. The wireless power transmitter of claim 4 , wherein said adaptive power transmitter includes a resistor and a switch, wherein in said first mode said switch is closed and said resistor is electrically connected to said adaptive power transmitter, wherein in said second mode said switch is open and said resistor is electrically disconnected from said adaptive power transmitter.
Wireless power transmission systems face challenges in efficiently delivering power to receiving devices while maintaining system stability and performance. One approach involves adaptive power transmitters that dynamically adjust their output to optimize power transfer. A specific implementation of such a system includes an adaptive power transmitter with a resistor and a switch. The resistor is selectively connected or disconnected from the transmitter circuit based on the operating mode. In a first mode, the switch is closed, electrically connecting the resistor to the adaptive power transmitter, which may help regulate power output or improve efficiency. In a second mode, the switch is open, disconnecting the resistor from the transmitter, which may reduce power dissipation or alter the transmitter's impedance characteristics. This configuration allows the transmitter to adapt its behavior based on operating conditions, such as the presence or absence of a receiving device, load requirements, or environmental factors. The resistor and switch combination provides a simple yet effective way to modify the transmitter's electrical properties, enhancing its versatility and performance in wireless power applications. This approach is particularly useful in systems where dynamic adjustments are needed to maintain optimal power transfer while minimizing energy losses.
10. The wireless power transmitter of claim 4 , wherein said controller is configured to control the power transmitted to the remote device by selectively configuring the adaptive power transmitter between the first mode and the second mode by selectively configuring the adaptive power transmitter from the first mode to the second mode at least twice per wavelength of the power transmitted.
Wireless power transmission systems face challenges in efficiently delivering power to remote devices, particularly when the distance or alignment between the transmitter and receiver varies. Traditional systems often struggle to maintain optimal power transfer due to fixed transmission modes, leading to inefficiencies or overheating. This invention addresses these issues by introducing an adaptive wireless power transmitter that dynamically adjusts its operating mode to improve power delivery. The transmitter includes a controller that selectively switches between a first mode and a second mode at least twice per wavelength of the transmitted power. The first mode may involve a specific power transmission configuration, such as a focused beam or a broader field, while the second mode may use a different configuration, such as a phased array or a resonant coupling scheme. The controller monitors power transfer conditions, such as load impedance or received power feedback, and rapidly toggles between modes to optimize efficiency. This rapid switching ensures that the transmitter adapts to changing environmental or positional conditions, maintaining stable and efficient power delivery. The system may also include sensors or feedback mechanisms to further refine the switching logic. By dynamically adjusting the transmission mode at a high frequency relative to the power wavelength, the transmitter minimizes power loss and enhances reliability in wireless charging applications.
11. The wireless power transmitter of claim 4 , wherein said controller changes a drive signal operating frequency to indicate the wireless power transmitter is a loosely coupled transmitter.
A wireless power transmitter system includes a transmitter coil and a controller that generates a drive signal to power the coil. The system is designed for loosely coupled wireless power transfer, where the transmitter and receiver coils are not in close proximity or precise alignment. The controller adjusts the operating frequency of the drive signal to communicate the transmitter's loosely coupled nature to a receiver. This frequency adjustment serves as an identifier, allowing the receiver to recognize the transmitter's configuration and optimize power transfer efficiency. The system may also include a matching network to improve power transfer efficiency and a communication module to exchange data with the receiver. The transmitter dynamically adjusts the drive signal frequency based on detected receiver characteristics or environmental conditions to maintain optimal power transfer. This approach ensures reliable wireless power delivery even in scenarios with misalignment or varying distances between the transmitter and receiver coils. The frequency modulation technique distinguishes the transmitter from tightly coupled systems, enabling better compatibility and performance in loosely coupled wireless power applications.
12. The wireless power transmitter of claim 4 , wherein said controller controls an amount of the power transmitted by varying one or more of operating frequency, rail voltage, duty cycle of a driver, and phase of the driver.
A wireless power transmitter system includes a power source, a driver circuit, and a resonant circuit for transmitting power to a receiver device. The system is designed to efficiently deliver power wirelessly, addressing challenges such as power transfer efficiency, compatibility with different receiver devices, and dynamic power adjustment. The controller within the transmitter dynamically adjusts the power output by modifying one or more parameters, including the operating frequency of the resonant circuit, the rail voltage supplied to the driver, the duty cycle of the driver circuit, and the phase of the driver signals. These adjustments allow the transmitter to optimize power delivery based on factors such as load conditions, receiver characteristics, and environmental interference. By varying these parameters, the system can maintain efficient power transfer while accommodating variations in receiver distance, orientation, and power requirements. This adaptive control mechanism enhances the reliability and versatility of the wireless power transmission process.
13. A wireless power transmitter for wirelessly transmitting power to a remote device, said wireless power transmitter comprising: an adaptive power transmitter configured to transmit wireless power to the remote device, said adaptive power transmitter being configurable to a first mode and to a second mode, wherein in said first mode, said adaptive power transmitter has a first resonant frequency, wherein in said second mode, said adaptive power transmitter has a second resonant frequency which is different from the first resonant frequency; and a controller operably coupled to the adaptive power transmitter, said controller being configured to control the power transmitted to the remote device by a wireless power supply by selectively configuring the adaptive power transmitter between said first mode and said second mode, wherein said controller changes an effective resonant frequency for said wireless power transmitter based on an average of a duration of time over which the adaptive power transmitter is in the first mode and a duration of time over which the adaptive power transmitter is in the second mode.
Wireless power transmission systems face challenges in efficiently delivering power to remote devices, particularly when the resonant frequency of the transmitter and receiver must be matched for optimal energy transfer. Mismatched frequencies can lead to reduced efficiency, overheating, or even damage to the devices. To address this, a wireless power transmitter is designed with an adaptive power transmitter that can dynamically switch between two distinct resonant frequencies. The transmitter operates in a first mode with a first resonant frequency and a second mode with a second, different resonant frequency. A controller manages the switching between these modes, adjusting the effective resonant frequency of the transmitter based on the average time spent in each mode. This allows the transmitter to fine-tune its resonant characteristics to better match the receiver's frequency, improving power transfer efficiency and reliability. The controller's ability to dynamically adjust the resonant frequency ensures compatibility with various remote devices, even as their power requirements or environmental conditions change. This adaptive approach enhances the versatility and performance of wireless power systems in real-world applications.
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January 17, 2018
January 7, 2020
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